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x in (-oo:+oo)
(1/2)*(x-3) = 4 // - 4
(1/2)*(x-3)-4 = 0
1/2*(x-3)-4 = 0
1/2*(x-3)-4 = 0
1/2*x-11/2 = 0
1/2*x-11/2 = 0
1/2*x-11/2 = 0 // + 11/2
1/2*x = 11/2 // : 1/2
x = 11/2/1/2
x = 11
x = 11
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